Leica S lens on Fuji GFX 50s

[Tirpitz666]

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First preliminary test with the XPImage S-GFX adapter:

 

- the 30, 75 and 120 all work perfectly in MF with aperture control on my  GFX 100s

- the 180, curiously enough, gives the same Lens Error message and shows the same malfunctioning as the Kipon adapter, so there is clearly some kind of incompatibility issue with this camera-lens combination (last FW on both)

- AF doesn't work, most likely they didn't update the adapter before shipping to me, asked for instructions on how to do it myself

 

P.S. as at the end I don't need AF with Leica S lenses on my Fuji, now that I have a working MF adapter (save for the 180) but it seems to me that XPI is more willing to look in how to solve the issue, my Kipon adapter will now be put on sale, so feel free to contact me in case you may be interested (used price will take into account that now the new price has been reduced to Eur 848).

Edited Friday at 09:07 AM by Tirpitz666

[sostinv]

Does it do back/forth motor movement on initial start / switch to shooting from playback mode? Kipon does. It is so distracting if you want just use MF. But actually it is not Kipon, but a camera command. It does the same thing on native lenses, Kipon just translates signals. It would be better to disable motor movements at all if AF/MF switch stays on MF position.

[mikelevitt]

On 2/11/2025 at 11:54 AM, BernardC said:

Fuji's own lenses will take the sensor cover glass into account. It's conceptually the same as super-telephotos that have a filter slot at the rear. You need to keep a clear filter in that slot when you aren't using an effect filter.

It's absolutely not the same.  The telephoto clear filter is always just a flat uv filter, and can be replaced with polarizers, variable ND, or even gel filters (Canon makes a gel holder).  None of these are exactly the same as a UV filter but they all work fine, because putting something in this position in the optical path makes little difference - it's about 2 inches away from the sensor and "out of focus.  I've also used the gel holder empty, and nothing at all (because I removed a polarizer and forgot to bring the UV holder) with the slot taped over and it made no difference.  Imagine putting a finger in front of the hood on your 400 2.8 - you won't see it.  But if you put it in front of your sensor, you're going to see that.

On the other hand, the sensor cover glass makes a profound difference in the optical path, as the light rays are "in focus" at that point.  

[mikelevitt]

On 10/5/2025 at 3:39 AM, sostinv said:

As I discovered, doesn't really matter what the distance is. My copy doesn't seem to produce a sharp edge at F5.6 or F8 at any distance. I've attached crops from my copy at F5.6 – the center and edge. GFX100S II. Used a distance about 15 feet and tried my best to manually focus on the edge using 100% magnifier and DOF preview (to eliminate possible focus shift), but this is the best I could get. In case of FC, it should have been sharp when focused on the edge. It gets better at F11 and the best at F16 (diffraction dulls details though, but it become clearly defined, not smudged). The question is it considered "normal" for 100MP or I've just got a lemon.

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This doesn't look like a very good test to me.  I would suggest that you put the camera on a tripod, point it at a flat surface with a lot of texture (like a brick or concrete wall) making sure you get it as parallel as possible, and take some test shots wide open and at various apertures and various distances.  Printing out a test chart and taping it to a wall also might help you see if there is a problem with one corner, one side, etc.  The shots you posted don't really show anything, as you're not square to the subject.

[Tirpitz666]

@sostinv: yes it does, so it will take just that bit of time to shoot, even in MF. For the records, on the Fuji GFX 100S the AF with the XPImage still doesn't work, it's MF only, so for AF the Kipon is still the only game in town.

[mikelevitt]

I'm curious if anybody has tried this adapter with CS lenses?  Do they not work at all, or is the CS just not available.  Thanks.

[Tirpitz666]

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CS feature is not supported on these adapters, but the lenses work with the regular in camera shutter.

[Sarnian]

I've just had a long chat (via Messenger) with Xiaoming Zhang, the owner of Kipon. I said to him that the adapter isn't quite up to the task (perhaps 75% there, as far as AF reliability goes). I directed him to this thread so he can read other peoples' experiences (both good and bad - as it's not all bad). Hopefully he'll take up my offer.

As an aside, he feels that XPImage will be about a year away from adding AF to their adapter (if at all possible).